I know this does not break anything but just for the sake of consistency ... 1) The window.XSLTProcessor.toString() call returns: "[object XSLTProcessorConsructor]" instead of: "[object XSLTProcessorConstructor]" (little typo :). 2) The window.XMLDocument.toString() call returns: "[object DocumentConstructor]" instead of: "[object XMLDocumentConstructor]" (all the others consistent with the window property name). Thanks.
(2) happens because XMLDocument is just an alias for Document we have for compatibility. There is no such thing as XMLDocument in HTML5 or WebKit. So, this is expected behavior. (1) is something to be fixed, of course.
(1) has been fixed in <http://trac.webkit.org/changeset/61136>.